DOHC stands for Double Overhead Camshaft, which refers to an engine configuration commonly found in modern vehicles. It is a type of valve train system used in internal combustion engines, specifically in multi-cylinder engines.
In a DOHC engine, there are two camshafts positioned above the cylinder head on each side of the engine. The camshafts are responsible for operating the intake and exhaust valves in synchronization with the engine's combustion cycle. The term "overhead" is used to denote the position of the camshafts above the cylinder head, as opposed to being placed within the engine block.
Having two camshafts offers several advantages over a single overhead cam (SOHC) configuration. DOHC engines typically allow for better engine breathing and higher RPM capabilities due to improved valve control and less valvetrain interference. This results in enhanced power and performance, making DOHC engines popular in sports cars and high-performance vehicles.
Additionally, DOHC engines tend to have smaller and lighter valve components, which reduce friction and enable quicker valve response, thus optimizing fuel efficiency.
Overall, the DOHC configuration is known for its ability to deliver improved power output, increased engine efficiency, and enhanced performance characteristics, making it a sought-after engine design in the automotive industry.
